What's the best bug spray? for earwigs, flys, spiders etc in the house :(?

we moved to a house and its an old house we've lived here for 2 years n all..we did some little bit of renovation and stuff..and yeah every summer we get earwigs..centipede..flys..spiders around...pisses me off like hell specially in my room..is there any GOOD bug spray? that works?